The following magnetic reed switch alarm is made to be a home and handbag alarm that can be put on door on home windows, or put it inside a bag. A reed switch and a magnet form this circuit. SW1 opens whenever the magnet looses its contact with the reed switch. The circuit then starts oscillating and the loudspeaker convey a loud alarm sound. Therefore this circuit can be used as an anti-theft alarm.
A complimentary wired transistor pair is used as a high frequency oscillator driving a small loudspeaker directy. The form of this device is compact thanks to the low part count and 3V battery supply. Take note that before you assemble this circuit, the loudspeaker’s dimensions are only limited by the box that contain it. Because the stand-by current less than 20µA, an on-off switch is not needed. 100mA is the current when the alarm rings. SW1 can be replaced by a 3.5mm mono jack socket and the magnet by 3.5mm if the circuit is about to be used as anti-bag snatching. Last thing, do not use power supply more than 4.5V since it will damage the Q2. [source : english.cxem.net]
The Starting System Component for Chrysler Town and Country contains the parts back up switch with automatic transmission only, battery, ignition switch, neutral starting, positive temperature coefficient which is also the circuit protection for the feed ignition and located in the junction box, powertrain control module double start override, starter motor with integral solenoid, starter relay, wiring harness.